That the problem Norm the old cast iron block will not work with with the newer Magnetron ignition coils as the coils are negative ground. The flywheel magnet poles are reversed on these old cast iron block engines. Now most of the newer Briggs with aluminum blocks are negative ground with why the newer Magnetron coils work fine.
When I refer to cast iron block it is the same as crankcase. It not the same as the IC cast iron sleeved cylinders.
